linux-kernel - [PATCHv6 3/5] picoxcell: common SoC peripheral support

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Date:	Tue,  8 Mar 2011 15:06:55 +0000
From:	Jamie Iles <jamie@...ieiles.com>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	Jamie Iles <jamie@...ieiles.com>
Subject: [PATCHv6 3/5] picoxcell: common SoC peripheral support

Add the devices common to all picoXcell variants (UART and PMU). Other
peripherals such as DMA, SPI, fuses and EMAC will be added later
with driver support.

v3:
    - move device registration to an arch_initcall
    - mark common_devices with __initdata

v2: - split the UARTs into two separate platform devices and use
      PLAT8250_* as the IDs

Signed-off-by: Jamie Iles <jamie@...ieiles.com>
---
 arch/arm/mach-picoxcell/Makefile  |    3 +-
 arch/arm/mach-picoxcell/devices.c |  122 +++++++++++++++++++++++++++++++++++++
 2 files changed, 124 insertions(+), 1 deletions(-)
 create mode 100644 arch/arm/mach-picoxcell/devices.c

diff --git a/arch/arm/mach-picoxcell/Makefile b/arch/arm/mach-picoxcell/Makefile
index 493ec0e..3cace37 100644
--- a/arch/arm/mach-picoxcell/Makefile
+++ b/arch/arm/mach-picoxcell/Makefile
@@ -1,2 +1,3 @@
 obj-y				:= picoxcell_core.o io.o axi2cfg.o \
-				   time.o
+				   time.o \
+				   devices.o
diff --git a/arch/arm/mach-picoxcell/devices.c b/arch/arm/mach-picoxcell/devices.c
new file mode 100644
index 0000000..884ecb5
--- /dev/null
+++ b/arch/arm/mach-picoxcell/devices.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2010 Picochip Ltd., Jamie Iles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * All enquiries to support@...ochip.com
+ */
+#include <linux/serial_8250.h>
+#include <linux/serial_reg.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <mach/hardware.h>
+#include <mach/irqs.h>
+
+#include <asm/pmu.h>
+
+#include "picoxcell_core.h"
+#include "soc.h"
+
+#define UART_USR_REG_OFFSET			0x7C
+static struct plat_serial8250_port serial1_platform_data[] = {
+	{
+		.membase	= IO_ADDRESS(PICOXCELL_UART1_BASE),
+		.mapbase	= PICOXCELL_UART1_BASE,
+		.irq		= IRQ_UART1,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_DWAPB32,
+		.regshift	= 2,
+		.uartclk	= PICOXCELL_BASE_BAUD,
+		.private_data	= (void *)(PHYS_TO_IO(PICOXCELL_UART1_BASE +
+						      UART_USR_REG_OFFSET)),
+	},
+	{},
+};
+
+static struct resource serial1_resources[] = {
+	{
+		.start		= PICOXCELL_UART1_BASE,
+		.end		= PICOXCELL_UART1_BASE + 0xFFFF,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= IRQ_UART1,
+		.end		= IRQ_UART2,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device serial1_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM1,
+	.dev.platform_data	= serial1_platform_data,
+	.resource		= serial1_resources,
+	.num_resources		= ARRAY_SIZE(serial1_resources),
+};
+
+static struct plat_serial8250_port serial2_platform_data[] = {
+	{
+		.membase	= IO_ADDRESS(PICOXCELL_UART2_BASE),
+		.mapbase	= PICOXCELL_UART2_BASE,
+		.irq		= IRQ_UART2,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_DWAPB32,
+		.regshift	= 2,
+		.uartclk	= PICOXCELL_BASE_BAUD,
+		.private_data	= (void *)(PHYS_TO_IO(PICOXCELL_UART2_BASE +
+						      UART_USR_REG_OFFSET)),
+	},
+	{},
+};
+
+static struct resource serial2_resources[] = {
+	{
+		.start		= PICOXCELL_UART2_BASE,
+		.end		= PICOXCELL_UART2_BASE + 0xFFFF,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= IRQ_UART2,
+		.end		= IRQ_UART2,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device serial2_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM2,
+	.dev.platform_data	= serial2_platform_data,
+	.resource		= serial2_resources,
+	.num_resources		= ARRAY_SIZE(serial2_resources),
+};
+
+static struct resource pmu_resource = {
+	.start			= IRQ_NPMUIRQ,
+	.end			= IRQ_NPMUIRQ,
+	.flags			= IORESOURCE_IRQ,
+};
+
+static struct platform_device pmu_device = {
+	.name			= "arm-pmu",
+	.id			= ARM_PMU_DEVICE_CPU,
+	.num_resources		= 1,
+	.resource		= &pmu_resource,
+};
+
+static struct platform_device *common_devices[] __initdata = {
+	&serial1_device,
+	&serial2_device,
+	&pmu_device,
+};
+
+static int __init picoxcell_add_devices(void)
+{
+	platform_add_devices(common_devices, ARRAY_SIZE(common_devices));
+
+	return 0;
+}
+arch_initcall(picoxcell_add_devices);
-- 
1.7.4

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